19 December 2004 Most craters on the martian northern lowland plains are filled and many of them are buried just beneath the surface, or are mostly buried. This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows an example, in which only the crater's raised rim still pokes out above the surrounding plains. This crater is located near 46.2N, 257.7W. The image covers an area about 3 km (1.9 mi) wide. Sunlight illuminates the scene from the lower left.